You aren't getting much input to your question, probably all us old timers are not sure about the newer block. Most of us are used to the earlier blocks and so we're not sure what to recommend. Generally speaking, for a blower motor, you'd want to use a steel crank, good quality forged rods and forged pistons to give a 8.0:1 static compression ratio if you plan to crank up the boost and buzz the motor. If you're just looking to blow 6 psi or less into the motor, cast pieces will work just fine. A moderate cam ground on 112 degree centers will work well.